It looks like much of what Ralph-Atma Sphere, has said is true.
Odd ordered harmonics, when reduced relative to the even, make for a more listenable amp.
B
Odd ordered harmonics, when reduced relative to the even, make for a more listenable amp.
B
Excellent article in Stereophile
This is one of the most interesting articles I've read on harmonic distortion and its affect on sound quality and why the classic THD is a worthless specification.
https://www.stereophile.com/content/harmonic-convergence-effect-component-tweaking
https://www.stereophile.com/content/harmonic-convergence-effect-component-tweaking